Rewinder



1938- s; w. WARNER ET AL 2,141,629

REWINDER Filed May,8, 1937 5 Sheets-Sheet 1 'ferling M Warner BY Lynn 6.Case TTORNEY 1938- s. w. WARNER ET AL Q 2,

' v REWINDER Filed May a, 1937 5 Sheets-Sheet 2 INVENTOR'S 'Jler/in(Warner BY Lynn (85 Dec. 27, 1938. s. w. WARNER ET AL 2,141,629

REWINDER I Filed May 8, 1957 5 Sheets-Sheet s f A ORNEYS 06027, 1938.WWARNER AL I v 2,141,629

REWINDER Filed May a, 1937 5 Sheets-Sheet 4 INVENTORSI Sfer/mgnlM/mer gm1 6 Case Patented Dec; 27, 1938 PATENT oFFIc mawmnnn Sterling W. Warnerand Lynn B. Case, New

Brunswick, N.

L, assignors to John Waldron Corporation, New Brunswick, N. J., acorporation of New Jersey Application May s, 1937,

31 Claims.

This invention relates to strip material rewinders and more especiallyto such type rewinders in which the rewind roll rests upon a pair ofdriven rollers which efie'ct rotation of 5 the rewindiroll by frictionalcontact therewith.

An object of this invention is a rewinder of the aforesaid type providedwith hydraulic meansfor supporting independently of the I rollerssubstantially all but a predetermined 1o amount of material andassociated mechanism so that the weight supported by the rollers willremain substantially constant irrespective of increase in the totalweight of the rewind rollas it increases in size.

' of this invention will become apparent from the followingspecification and accompanying drawings, wherein:

Fig.. 1 is an elevation of one side of a rewinder embodying theinvention;

Fig. 2 is an elevation of the other side of said rewinder;

Fig. -3 is a horizontal section substantiallyon empty;

Fig. 4 is a front Fig. 5 is a section on'the line Fig. 6 is an enlargedsection on of Fig. 3, and

Fig. 7 is a diagrammatic view of the oil circuit.

A frame It supports a pair of horizontal rollers II and |2 which havetheir shafts journalled elevation partly in section; 5-5 of Fig.4; theline 5-6 the rollers are provided with gears l3 and I4, both of whichmesh with a pinion IS on a shaft I6 suitably journalled in the frame In.Fixed to the shaft I5 is a pinion" which meshes with a pinion l8.mounted on a shaft I9 suitably journalled on the frame I0andconstituting the main drive shaft of the machine. The shaft |9 isdriven byany suitable source of power (not shown) Two hollow verticalcolumns. 20 have their lower ends set into the frame H] and are arrangedat either side of the machine. Oneach column 20 is slidablymounted ahead 2| and the shaft of the rewind spindle 22 has its ends journailedin bearings formed on said heads. Each of the bearings comprises anelement 23 pivoted to the head and provided with 'a' latch 24 whichnormally holds it in the position shown in Figs. 1 and 2. The elements23 are swung away from the position shown in Figs. 1 and 2.to perthetotal weight of the roll of -str ip 3 Other objects, novel features andadvantages the line 33 of Fig. 2fwith' the rewind spindle in bearingsprovided on the frame.- At one end,..

mit easy removal of the "rewind spindle from the Serial No. 141,451

heads 2|. Each column 20 is provided with a pair of diametricallyopposed vertical slots 25 through which each head 2| is connected to anelevating member later to be described.

Into the lower end of each column 20 extends a hollow post 26 having itslower end resting on and fixed to the base of the frame I0.

On each post 26 is slidably mounted a. sleeve 21 at the lower end ofwhich is provided a stuffing box 21a which forms a' liquid-tight sealbetween the post and sleeve. Each sleeve 27 is provided with a head 21bfrom which guide members 28 extend through the slots 25 in the column 20and a mast 29 extends upwardly from the head. The head 2| is attached tothe guides 28 for unitary movement with the sleeve 21. A tube 30surrounds the mast 29 and in the tube is fixed a plug 30a which isengaged by the top I of the mast 29. The tube 30 extends through the cap3| closing the upper end of the column 20. 1 A'cap 32 closes the upperend of each tube 30 and includes a frame in which are journalled a pairof sprockets 33. On each column 20 is slidably mounted a carriage 34 anda smoothing or pressing roller 35 has theends of its shaft journalled inbearings'provided on the carriages 34. A bevel gear 36 is provided atone end of the shaft for the roller 35 and meshes with a bevel gear .31journalled in a bearing formed on one carriage 34. The bevel gear 31 isslidably keyed t'o'a vertical shaft 38 journalled at its upper end in abearing 39 supported by one cap 3| and at its lower end in a bearing 40supported by the frame II]. A bevel gear 4| fixed to the shaft 38 mesheswith a bevel gear 42 fixed to the shaft l6 and through the .train ofgears just described rotation-of'the rollers 35 is efiected. A shaft 43has its ends journalled in bearings formed on the carriages 34 and ateach end of the shaft is provided a pinion 44 which meshes with a rack45 formed on the column 20. a

A shaft 46 has its ends journalled in bearings provided in the caps 3|and at each end of the -shaft is provided a pinion 41 which mesheswith'a rack 48 fixed to the tube 30.- A sprocket 49 is fixed to anextension of the shaft 46. A sprocket chain 50 leads upwardly from eachcarriage 34 over the sprockets 33 and downwardly througha coil spring 5|and is attached to a rod 52, the lower end of which is screw threadedand extends into the screw-threaded bore of a worm wheel 53 journalledin bearings formed on the frame Ill. The lower end of the spring 5| isattached to the rod 52 and its upper end is attached to the chain .50with suficient slack in the chain to permit full expansion of thespring. Each worm wheel 53 meshes with a worm gear 54. fixedto a' shaft55 extending transversely of the machine and provided at one side of themachine with a hand wheel 56.

A pipe 5'! leads to the bottom of each post 26 and through the pipe 51oil or other suitable liquid is supplied under pressure to the interiorof post 26 and sleeve 21 for the purpose'of elevating the mast 29 andtube 30 assembly with corresponding elevation of .the heads 2!. Uponupward movement of the tubes 30, the carriages 34 will be-elevatedthrough the medium of the sprocketchains 50 and springs 5i which willexpand when subjected to the pull applied by. the roller 35 if otherwiseunsupported. Thecarriages 34 are maintained in horizontal alinementmovable to control the effective area of the outlet port 0. A lever arm6| fixed to a shaft 52 suit-- automatically oontrolli'ng'the pressure ofthe oil supplied to-the post 26 as well as for permitting manualregulation. A pipe 58!; leads from the outlet of the pump to a valve 59which will later be described more in detail and a-pipe 51a leads fromthe valve 59 to the pipe 51'. Also, a pipe 59b also leads from the valve59 and communicates with the bottom'of the cylinder of a valve-Cthr'ough' an inlet portion I. -A pipe59a leads from the outlet port ofthe valve C to the inlet of the pump 58. The pipes 58a and 51a conductoil through the valve 59 to the pipe 51 while the pipe 59a, valve C anda pipe 59b constitute a bypass between the inlet and outlet of the pump58. A piston 50 projects into said cylinder and is ably journalled inthe frame ill rests upon the head of the piston 60 and a weight W isslidably mounted on the lever arm 6|. The pressure of the oil suppliedto the cylinders 26 depends upon the position of the weight W and arod'63 is pro-- videdfor sliding the weight back and forth on the lever'arm. An arm'64 is fixed to the shaft 62 and carries a collar 65 throughwhich extends a rod 66. Acoil spring 61 surrounds the rod 66- and. isinterposed between the collar 65 and a collar 68 attached to the rod 56.The lower end -of the rod 66 is attached to a crank arm 69 of a shaft 10suitably journalled in the frame ill. A sprocket II is fixed to theshaft 10 and a sprocket chain 12 passes around the sprockets B9 and |l.

The spring 97 opposes the weight W and with the crank arm 69 in theposition shown in Fig. 6, exerts its maximum lifting eflect on theweight W. Upon elevation of the tubes 30 rotation is eflected oi' thesprocket 49 through the medium z of the shaf (pinions 41 and racks 48,thereby effecting rotation of the shaft 10 through the intermediary ofthe sprockets 49 and H and sprocket'chain 12. The shaft 10 is rotated insuch direction that the rod 66 moves downwardly, thereby decreasing thelifting effect ofthe spring 97 on the lever arm 64, thereby increasingthe effect of the weight W on the piston 60. As a result, a higherpressure is required to lift the weight W to open the outlet port 0 inthe valve C with. a consequent increased pressure applied by the liquidin the posts 26.

The strip material to be rewoundis passed from As the tubes 30 are ele--co-operating parts.

a feed roll (not shown) under a roller I3 journalled in bearings 14slidably mounted on vertical posts supported by the frame i0. Springs 15are interposed between the bearings and nuts I6 sothat the roller 13 isresiliently supported. From the roller 13 the strip passes over a secondguide roller 13a; then under a series of three guide rollers 13b, 13cand 13d. After leaving the guide roller 13d, the strip passes over thedriving and supporting rollers I l and i2 and around the spindle 22 towhich it is attached in any suitable manner; The rewind roll of stripmaterial on the spindle 22 rests on the rollers II and I 2 and rotationof them efiects rotation of the roll by frictional contact. The roller35 engages the roll of strip material and is driven at slightly slowerperipheral speed than the rollers Ii and i2 through the medium of thegearing previously described to smooth and tighten the rolled strip.

At the beginning of the rewind operation, the weight W is set on the arm6| at such position that pil is supplied to the post 26 and sleeves 21at the proper pressure nearly to counterbalance the weight carried bythe sleeves. As the strip material is wound up on the spindle 22, theweight and diameter of the rewound roll increase. The heads 2| andspindle 22 are moved upwardly by the increase in diameter of the rewindroll with corresponding elevationof the tubes 30 and double upwardmovement of the roller 35. Upward movement of the tubes 30 efiectsrotation of the spindle 49 and crank arm 69 as previouslydescribed,thereby increasing the efiectiveness of the weight W as also previouslydescribed, so that the pressure of the oil supplied to the posts 26-isincreased and the heads 2| support the increased weight of the roll ofstrip material. The movement of the crank arm 69 is such that theincrease or pressure in the oil substantially counterbalances theincrease of weight in the rewind roll. Adjustment of the roller 35relatively to the spindle 22 is effected by vertical movement of therods 52 through rotation of the worm wheels 53 by the hand wheel 56.

In each cap 3| is provided a dog 3i a to engage a notch 3Ib in the tube30 to lock the same in elevated position. The two dogs areinterconnected by a shaft 3lc at one end of which is provided a leverarm 3ld to the ends of-which are attached rods or wires 3|e and MI bymeans of which the dogs may be moved into and out of operative position.A

. The springs provide means for compensating-the pressure applied by theroller 35 to the roll of material wound on the spindle 22. The forceapplied by the roller 35 to the roll of strip material on the spindle 22operation of the hand wheel 55. Rotation of this may be varied by wheelin such direction as to move the rods 52 downwardly causes expansion ofthe springs 5l' with consequent decrease intheforce applied by the rolls35 to the roll of strip material. By means of the adjustment justdescribed, the weight applied to the rewind roller may be regulated inaccordance with its width ,so that the same pressure may be appliedto'the rewind roll by the roller 35 irrespective .of the width of thestrip material which is being rewound.

The valve 59 isprovided with additional con- ,nections which permitmanual control of the raising and lowering'of the sleeves 21 and theirThe valve comprises a tubular casing in which isslidably arranged apiston 85 provided with an operating handle 81L Ports", 18, I9, and 8|are provided in the casing and the lower end of the piston 86 has a inthe first on bottom position.

portion 82 of reduced diameter. The pipe 58a leads to the port 19 whilethe pipes 51a and 59b lead from the port 18. A pipe 83 leads from theport 11 to the pipe 59a and a pipe84 leads from the port 80 to the pipe51. The piston 86 has four operating positions and in Fig. 6 is shownoil flows from the pump ports 19 and 80 and through pipes 84 and 51 tothe post 26. The piston is arranged in its first position when it isdesired to elevate the sleeves 21 under manual control. In'the second ornext higher position of the piston 86, communication is interruptedbetween the ports 18 and 80 so that oil cannot flow in either direction,thus locking the sleeves 21 in any desired position of elevation. In thethird or next higher position of the piston 86, the port 8| is put incommunication with the port 18, thus conditioning the device forautomatic operation as previously described. In the fourth or highestposition of the piston 86,

.the port I1 is brought into communication with the port 18, thuspermitting oil to flow from the post 26 through the pipe 51a and pipe 83and pipe 59a to the pump inlet, thus permitting descent of the sleeves21 under manual control.

A by-pass 85 between the pump inlet and pump outlet controlled by asuitable relief valve 85a is provided in the usual manner. The valve 59provides means for disconnecting the automatic valve C and utilizing thetotal pump pressure to lift the heads 2| to any desired height for thepurpose of removing the roll of rewound strip material or for moving theheads and carriages up and down for any other purpose. By reason of thefact that the tubes 30 are slidable on the masts 29, the tubes may beheld in elevated position with the masts 29 and sleeves 21 in loweredposition.- A vent 86 is provided in each tube 30 just below the p1ug30ato permit ingress and egress of air upon relative movement of the mastand tube. 4

We claim:

1. A device of the character described com prising a pair of parallelhorizontal rollers, a rewind spindle above said horizontal rollers,means supporting said rewind spindle for vertical movement, a smoothingroller for engagement with strip material wound on said rewind spindle,means supporting said tical movement, interconnections between said twovertically movable supporting means for effecting relative movement ofsaid two means with the extent of movement of the second means beingsubstantially twice that of the first means, means for applyinghydraulic lifting pressure to said first supporting means, and means forvarying said applied pressure.

2. A device of the character described comprising a pair of parallelhorizontal rollers, a rewind spindle above said horizontal rollers,means supporting said rewind spindle for vertical movement, a smoothingroller for engagement with strip material wound on said rewind spindle,means supporting said smoothing rollerfor ver- -tical movement,interconnections between said two vertically movable supporting meansfor effecting relative movement of said two means with the extent ofmovement of the second means being twice that of the first means, meansfor applying hydraulic lifting pressure to said first supporting means,and means for varying said appliedpressure in accordance with theelevation of said first means.

In this position, 58 through the pipe 58a,

smoothing roller for ver--' slidably mounted on each' column,

- journalled in said carriages, sprockets means for said rewind spindlecarried by said movable sections, a smoothing roller above said rewindspindle and adapted to contact with a roll of material in said spindle,means supporting said smoothing roller for vertical movement, a pulleycarried by each movable section, a cable passing over each pulley andconnected at one end to said last-named meansand at its other end to theframe, and means for varying the pressure of the liquid supplied to saidextensible tubular members. 1

4. A device of the character'described comprising a frame, a pair ofparallel'horizontal rollers journalled in said frame, a verticalextensible tubular member at each end of said rollers, each tubularmember comprising a fixed and a movable section, means for supplyingliquid under pressure to said tubular members, a rewind spindle abovesaid pair of rollers, supporting means for said rewind spindle carriedby said movable sections, a smoothing roller above said rewind spindle,means supporting said. smoothing roller for vertical movement, pulleyscarried by said movable sections, cables passing over said pulleys andconnected at one end to said lastnamed means and at the other end tosaid frame, and means for varying the pressure of the liquid supplied tosaid tubular members in accordance with the elevation of said rewindspindle.

5. A device ofthe character described comprising a frame, a pair ofparallel-horizontal rollers journalled in said frame, a column at eachend of said rollers, an extensible tubular member in each columncomprising a fixed and a movable section, means for supplying liquidunder pressure to said tubular members, a head slidably mounted on eachcolumn, connections between said heads and movable sections foreffecting unitary movement thereof, a rewind spindle above said pair ofrollers and journalled in said heads, a carriage slidably mounted oneach column above said head, a smoothing roller journalled insaidcarriages, sprockets supported by said movable sections at the upperends thereof, sprocket chains passing over said sprockets, each chainbeing connected at one end to one of said carriages and at the other endto said frame, and means for varying tht: pressure of the liquidsupplied, to said extensible tubular members.

6. A device of the characterdesc'ribed comprising a frame, a pair ofparallel horizontal rollers journalled in said frame, a column at eachend of said rollers, an extensible tubular member in each columncomprising a fixed and a movable section, means for supplying liquidunder pressure to said tubular members, a head connections between. saidheads. and movable sections for effecting unitary movement thereof, arewind spindle above said pair of rollers and journalled in saidheads, acarriage slidably mounted on each column above said head, a smoothingroller supported by said movable sections at the upper ends thereof,sprocket chains passing over said sprockets, each chain being connectedat one end to one of said carriages and at the other end to said frame,and means for varying the pressureof the liquid supplied to said tubularmembers in accordance with the elevation of said rewind spindle.

spindle above said pair of rollers and journalled in said heads, acarriage slidably mounted on each column abovetsaid head, a smoothingroller journalled in said carriages, sprockets supported by said movablesections at the upper ends thereof, sprocket chains passing over saidsprockets, each chain being connected at one end to one of saidcarriages and at" the other end to said frame, racks on said columns, ashaft journalled in said carriages, pinions fixed to said shaft'andmeshing with said racks, and means for varying the pressure of theliquid supplied to said-tubular extensible members. 8. A device of thecharacter described comprising a frame, a pair of parallel horizontalrollers journalled in said frame, a column at each .end of said rollers,an extensible tubular member in each column comprising a fixed and amovable section, means for supplying liquid under pressure to saidtubular members, a head slidably mounted on each column; connectionsbetween said heads" and movable sections for effecting unitary movementthereof, a rewind spindle above said pair of rollers and journalled insaid heads, a carriage slidably mounted on each column above said head,a smoothing roller journalled in said carriages, sprockets supported bysaid movable sections at the upper ends thereof, sprocket chains passingover'said sprockets,

each chain being connected at one end to one of said carriages and atthe other end to said frame, racks on said columns, a shaft journalledin said carriages, pinions fixed to said shaft and meshing with saidracks, and means for varying thepressure of the liquid supplied to saidtubular members in accordancewith the elevation of said rewind spindle.l

9. A device of the character described comprising a frame, a pair ofparallel horizontal rollers journalled in said frame, a verticalextensible tubular member at each end of said rollers, each tubularmember comprising a fixed and a movable section, means for supplyingliquid under pressure to said tubular members, a rewind spindle abovesaid'pair of rollers, supporting means for said rewind spindle carriedby said movable sections, a smoothing roller above said rewind spindle,means supporting said smoothing roller for vertical movement, sprocketscarried by said, movable sections, sprocket chains passing over saidsprockets, each chain being connected at one end to saidsmoothing-roller supporting means, extensible springs connected atone'end to said frame and at the other end to said sprocket chains, andmeans for varying the pressure of the liquid supplied to said tubularmembers in accordance'with the elevation of said rewind spindlef 10. Adevice of 'the character described comprising a frame. a pair ofparallel horizontal rollers journalled in said frame, a column at eachend of said rollers, an extensible tubular member in each columncomprising a fixed and a movable section, means for supplyingliquidunder pressure to said tubuluar members, a head slidably mountedon each column, connections between said heads and movable sections foreffecting unitary movement thereof, a rewind spindle above said pair ofrollers and journalled in said heads, a carriage slidably mounted oneach column above said head, a smoothing roller journalled in saidcarriages, sprockets supported by said movable sections at the upperends thereof, sprocket chains passing over said sprockets, each chainbeing connected at one end to oneof said carriages, extensible springsconnected at one end to said frame and at .the other end to saidsprocket chains and means for varying the "pressure of the liquidsupplied to said tubular members in accordance with the elevation ofsaid rewinding spindle.

11. A device of the character described comprising a frame, a pair ofparallel horizontal rollers journalled in said frame, a column at eachend of said rollers, an extensible tubular member in each columncomprising a fixed and a movable section, means for supplyingliquidunder pressure to said tubular members, a head slidablymoun'ted'on each column, connections between said heads and movablesections for effecting unitary movement thereof, a rewind spindle abovesaid pair of rollers and journalled in said heads, a carriage slidablymounted on each column above said head, a smoothing roller journalled insaid carriages, sprockets supported by said movable sections at theupper ends there,

of, sprocket chains passing over said sprockets,

each chain being connected at one end to one of saidcarriages,extensible springs connected at one end to said frame and at the otherend to said sprocket chains, racks on said columns, a shaft journalledin said carriages, pinions fixed to said shaft and meshing with saidracks, and

means for varying the pressure of the'liquld supplied to said tubularmembers in accordance with the elevation of said rewind spindle.

12. A device of the character described comprising a frame, a pair ofparallel horizontal rollers journalled in said frame, a verticalextensible tubular member at each end of said rollers, each tubularmember comprising a fixed and a movable section, means for supplyingliquid under pressure to said tubular members, a rewind spindle abovesaid pair'of rollers, supporting means for said rewind spindle carried:by ,said movable sections;a shaft having a rack and pinion connectionwith said movable sections, and means controlled by the rotation of saidshaft for varying the plied to said extensible tubular members,

13. A device of the character described comprising a frame, a pair ofparallel horizontal rollers journalledin said frame, a verticalextensible tubular member at each end of said rollers, each tubular anda movable, section, means for supplying liquid under pressure to saidtubular members,

a rewind spindle above said pair of rollers, supporting means forsaidrewind spindle carried by said movable sections, a'smoothing rollerabove said rewind spindle, means supporting said smoothing roller forvertical movement, a pulley carried by each movable section, a cablepassing over each pulley and connected at one end to said last-namedmeans and -at. its other end to member comprising a fixed pressure ofthe liquid supthe frame, a shaft having a rack and pinion connectionwith said movable sections, and means controlled by the rotation of saidshaft for varying the pressure of the liquid supplied to said tubularmembers.

14. A device of the character described comprising a frame, a pair ofparallel horizontal rollers journalled in said frame, a column at eachend of said rollers, an extensible tubular member in each columncomprising a fixed and a movable section, means for supplying liquidunder pressure to said tubular members, a head slidably mounted in eachcolumn, connections between said heads and movable sections foreffecting unitary movement thereof, a rewind spindle above said pair'ofrollers and journalled in said heads, a shaft having a rack and pinionconnection with said movable sections, and means controlled by rotationof said the pressure of the liquid supplied to said tubular members.

15. A device of the character described comprising a frame, a pair .ofparallel horizontal rollers journalled in said frame, a column at eachend of said rollers, an extensible tubular -member in each columncomprising a fixed and .a movable section,

means for supplying liquid under pressure to said tubular members, ahead prising a frame, a pair of parallel horizontal rollers, eachtubular member comprising a fixed slidably mounted oneach column,connections between said heads and movable sections for effectingunitary movement thereofpa rewind spindle above said pair of rollers andjournalled in said heads, a carriage slidably mounted on each columnabove said head, a smoothing roller journalled in said carriages,sprockets supported ,by said movable sections at the upper ends said Ithereof, sprocket chains passing over sprockets, each chain beingconnected at one end to one of said carriages and at the other end tosaid frame, a shaft having a rack and pinion connection. with saidvmovable sections, and

means controlled by rotation ofsaid shaft for varying the pressure ofthe liquid supplied to said tubular members.

16. A device of the character described comprisinga frame, apair ofparallel horizontal rollers journalled .in said frame, a-verticalextensible tubular member at each end of said rollers, each tubularmember comprising a fixed and a movable section, a rewind spindle abovesaid pair of-rollers, supporting means for said rewind spindle carriedby said movable sections, a pump for supplying liquid to said tubularmembers, a by-pass around said pump, a valve in said by-pass, a weightedlever tending to close said valve, and means responsive to the elevationof said rewind spindle for controlling the amount of weight-applied tosaid valve.

17. A device of the character described comin said frame, a verticalexmember at each end of said rollers journalled tensible tubular and amovable section, a rewind spindle above said pair of rollers, supportingmeans for said rewind spindle carried by said movablesections, a pumpfor supplying liquid to said tubular members, a by-pass around saidpump, a valve in said by-pass, a weighted lever tending to close saidvalve, a spring opposing the action of said the elevation of ness ofsaid spring.

18. A device of the character described comprising a frame, a pair ofparallel horizontal shaft for varying members, a by-pass a movablesection,

rewind spindle carried by said movable sections,. liquid to said tubulara pump for supplying members, a 'by-pass around said pump, a valve insaid by-pass, a weighted lever tending to close said valve, a crank arm,tween said crank arm and lever, and means actuated by said movablesections for rotating said crank arm to vary the effectiveness of saidspring. I

19. A device of the character described comprising a frame,- a pair ofparallel horizontal rollers journalled in said frame, a verticalextensible tubular member at each end of said rollers, each tubularmember comprising a fixed and a movable section, a rewind spindle abovesaid pair of rollers, supporting means for said rewind spindle carriedby said movable sections, a pump for supplying liquid to said tubular varound said pump, a valve in said by-pass, a weighted lever tending toclose said valve, a crank arm, a spring interposed between said crankarm and lever, a shaft having rack and pinion connection with saidmovable sections, and driving connections between said shaft and crankarm.

'20. A device of the character described comprising a frame, a pair ofparallel horizontal rollers journalle d in said frame, a column at eachend of said rollers, an extensible tubular member in each columncomprising a fixed and a movable section, a head slidably mounted oneach column,. connections between said heads and movable sections forunitary movement thereof, a rewind spindle above said rollers andjournalled in said heads, a shaft supported by said columns and having arack and pinion connection with each movable section, a pump forsupplying liquid to said tubular members, a bypass around said pump, avalve in said by-pass, a weighted lever tending to close said valve, andmeans operated 'by said shaft for controlling the amount of weightsupplied to said valve.

21, A device of the character described comprising a frame, a pair ofparallel horizontal rollers journalled in said frame, a column at eachend of said rollers, an extensible tubular member in each columncomprising a fixed and a headslidably mounted on each column,connections between said heads and movable sections for unitary movementthereof, a rewind spindle above said rollers and journalled in saidheads, a shaft supported by said columns and having a rack and pinionconnection with each movable section, a pump for supplying liquid tosaid tubular members, a by-pass around said pump, a valve insaidby-pass, a weighted lever tending to close said valve, a spring opposingthe action of said lever, and means operated by said shaft for reducingthe effectiveness of said spring.

22. A device of the character described comprising. a frame, a pair ofparallel horizontal rollers journalled in said frame, a column at eachend of said rollers, an extensible tubular member in each columncomprising a fixed and a movable section, a head slidably mounted oneach column, connections between said heads thereof, a rewind spindleabove said rollers and journalled in said heads, a shaft supported by aspring interposed beand movable sections for unitary movement the latterto varythe effectiveness of said spring.

23. A device of the character described comprising a frame, a pair ofparallel horizontal rollers journalled in said frame, a column at eachend of said rollers, an extensible tubular member in each columncomprising afixed and a movable section,

said columns and having a rack and pinion connection with each movablesection, a carriage slidably mounted on each column above said head, asmoothing roller journalled in said car- 7o riage slidably mounted oneach column above each end of said riages, sprockets supported by saidmovable sections at the upper endsthereof, sprocket chains passing oversaid sprockets, eachchain being connected at one end to one of saidcarriages and at the other endto said frame, a pump for supplying liquidto said tubular members, a by-pass around said pump, a valve in saidby-pass, a weighted lever tending to close said valve, and meansoperated by saidshaft for controlling the amount of weight suppliedto-said valve.

24. A device of the character described comprising a frame, a pair ofvparallel horizontal rollers journalled in said frame, a column ateach-end of said rollers, an extensible tubular member in each columncomprising a fixed and a movable section, a head slidably mounted oneach column, connections between said heads thereof,

,said columns and having a rack and pinion connection with each meansoperated by said shaft for reducing the effectiveness of said spring.

25. A device of the characterdescribed comprising a frame, a pairofparallel horizontal rollers journalled in said frame, a column atrollers, an extensible tubular member in each column comprising a fixedand a movable section,

said head, a smoothing roller journalled in said carriages, sprocketssupported by said movable sections at the upper ends thereof, sprocketchains passing over said sprockets, each chain a head slidably mountedon sprockets, each chain being tubular members,

said spring.

26. A device of the character described oomprising'a frame, a pairofparallel horizontal rollers journalled in said frame, a column at eachend of said rollers, an extensible tubular member in each column amovable section, a head slidably mounted on a by-pass around said pump,a valve in said by-pass, a weighted lever tending to close said valve,and means operated by said shaft, for controlling the amount of weightsupplied to said valve.

27. A device of the character described comprising a frame, a pair ofparallel horizontal rollers journalled in said frame, a column at eachend of said rollers, an extensible tubular member in each columncomprising a fixed and a movable section, a head slidably mounted oneach column, connections between said heads and movable sections forunitary movement thereof, a rewind spindle above said rollers andchains, a pump for supplying liquid to said tubular members, a by-passaround said pump, a

each end of said rollers, an extensible tubular nection with eachmovable section, slidably mounted one end to one of said,

supplying liquid to said parallel horizontal, rollers journalled insaidframe, a column at amnes a head, a smoothing roller journalled in saidcar riages, sprockets supported by said movable sections at the upperends thereof, sprocket chains .passing over said sprockets, each chainbeing connected at one end to one of said carriagesjf extensible springsconnected at one eiid to said frame and at the other end to saidsprocket chains, a pump for supplying liquid to said tu'bular members, ahy-pass around said pump, a valve in said by-pass, a weighted levertending to close said valve, a crank arm, a spring interposed betweensaid crank'arm and lever, and driving connections between said shaft andcrank arm for rotating the latter to vary the effectiveness of saidspring.

29. A device of the charactendescribedaccording to claim 26characterized by racks on said columns, a shaft journalled in saidcarriages and pinions fixed to said shaft and meshing with said racks.

*i" 30. A device of the character described according to claim 27characterized by racks on said columns, a shaft journalled in saidcarriages and pinions fixed to said shaft and meshing with said racks. VI

31'. A device of the character described according to claim 28characterized by racks on said columns, a shaft joumalled in saidcarriages and pinions fixed to said shaft and meshing with said racks. iSTERLING W WARNER.

LYNN B. CASE.

